Nike Claims Wal-Mart Copied Shoes

Nike Inc. is suing Wal-Mart Stores Inc., alleging the retailer is selling shoes that step too closely on the sports brand's own patented technology and design.

In the complaint, filed in a federal district court in Chicago this week, the sportswear giant accused the world's largest retailer of offering "shoes having designs that are covered by the Nike design patents." Nike named two patents related to its popular...